https://support.apple.com/en-ca/HT204104
Find out if liquid damaged your iPhone or iPod
iPhone and most iPod devices are equipped with Liquid Contact Indicators (LCIs) that you can see from the outside.
An LCI will activate when it contacts water or a liquid containing water. The indicator's color is normally white or silver, but when it contacts water or a liquid containing water, it will turn fully red. An LCI won't activate because of humidity and temperature changes that are within the product's environmental requirements.
To find out if the LCI in your device contacted liquid, find your product in the table below and locate the LCI or LCIs in your device. To help you see the LCI, use a lighted magnifying glass and angle the light or the device until you can see the LCI.
This table shows where the indicator (or indicators) are and how they look after being exposed to liquid:
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
1